DecodeJSON encoing aware

Added encoding awareness to the DecodeJSON helper function.

Author: Dean Karn

README.md

@@ -1,6 +1,6 @@
 package pure
 ============
-<img align="right" src="https://raw.githubusercontent.com/go-playground/pure/master/logo.png">![Project status](https://img.shields.io/badge/version-4.1.1-green.svg)
+<img align="right" src="https://raw.githubusercontent.com/go-playground/pure/master/logo.png">![Project status](https://img.shields.io/badge/version-4.2.0-green.svg)
 [![Build Status](https://travis-ci.org/go-playground/pure.svg?branch=master)](https://travis-ci.org/go-playground/pure)
 [![Coverage Status](https://coveralls.io/repos/github/go-playground/pure/badge.svg?branch=master)](https://coveralls.io/github/go-playground/pure?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/pure)](https://goreportcard.com/report/github.com/go-playground/pure)

_examples/basic/main.go

@@ -10,7 +10,7 @@ import (
 func main() {
 
 	p := pure.New()
-	p.Use(mw.LoggingAndRecovery(true))
+	p.Use(mw.LoggingAndRecovery(false))
 
 	p.Get("/", helloWorld)
 

helpers.go

@@ -1,6 +1,7 @@
 package pure
 
 import (
+	"compress/gzip"
 	"encoding/json"
 	"encoding/xml"
 	"io"
@@ -333,13 +334,18 @@ func DecodeMultipartForm(r *http.Request, includeQueryParams bool, maxMemory int
 // included eg. route /user/:id?test=true both 'id' and 'test' are treated as query params and
 // added to parsed JSON; in short SEO query params are treated just like normal query params.
 func DecodeJSON(r *http.Request, includeQueryParams bool, maxMemory int64, v interface{}) (err error) {
+	var body io.Reader = r.Body
 
-	err = json.NewDecoder(io.LimitReader(r.Body, maxMemory)).Decode(v)
-
+	if encoding := r.Header.Get(ContentEncoding); encoding == Gzip {
+		body, err = gzip.NewReader(r.Body)
+		if err != nil {
+			return err
+		}
+	}
+	err = json.NewDecoder(io.LimitReader(body, maxMemory)).Decode(v)
 	if includeQueryParams && err == nil {
 		err = DecodeQueryParams(r, includeQueryParams, v)
 	}
-
 	return
 }
 

helpers_test.go

@@ -219,6 +219,30 @@ func TestDecode(t *testing.T) {
 	Equal(t, test.Posted, "value")
 	Equal(t, test.MultiPartPosted, "value")
 
+	var buff bytes.Buffer
+	gzw := gzip.NewWriter(&buff)
+	defer func() {
+		_ = gzw.Close()
+	}()
+	_, err = gzw.Write([]byte(jsonBody))
+	Equal(t, err, nil)
+
+	err = gzw.Close()
+	Equal(t, err, nil)
+
+	test = new(TestStruct)
+	r, _ = http.NewRequest(http.MethodPost, "/decode/13?id=14", &buff)
+	r.Header.Set(ContentType, ApplicationJSON)
+	r.Header.Set(ContentEncoding, Gzip)
+	w = httptest.NewRecorder()
+
+	hf.ServeHTTP(w, r)
+
+	Equal(t, w.Code, http.StatusOK)
+	Equal(t, test.ID, 14)
+	Equal(t, test.Posted, "value")
+	Equal(t, test.MultiPartPosted, "value")
+
 	test = new(TestStruct)
 	r, _ = http.NewRequest(http.MethodPost, "/decode-noquery/13?id=14", strings.NewReader(jsonBody))
 	r.Header.Set(ContentType, ApplicationJSON)